摘要Cross sections of the 10B(n,α)7Li reaction (including the total, the “leaking” alpha, forward alpha and backward alpha parts) at En =4.0 and 5.0 MeV were measured using an asymmetrical twin gridded ionization chamber and two back−to-back 10B samples. Measurements were performed at the 4.5 MV Van de Graaff accelerator of Peking University. Monoenergetic neutrons were produced through the 2H(d,n)3He reaction with a deuterium gas target. Absolute neutron flux was determined by a 238U sample set inside the gridded ionization chamber and a BF3 long counter was employed as a neutron flux monitor and for normalization. The present results are compared with previous measurements and evaluations.
Abstract：Cross sections of the 10B(n,α)7Li reaction (including the total, the “leaking” alpha, forward alpha and backward alpha parts) at En =4.0 and 5.0 MeV were measured using an asymmetrical twin gridded ionization chamber and two back−to-back 10B samples. Measurements were performed at the 4.5 MV Van de Graaff accelerator of Peking University. Monoenergetic neutrons were produced through the 2H(d,n)3He reaction with a deuterium gas target. Absolute neutron flux was determined by a 238U sample set inside the gridded ionization chamber and a BF3 long counter was employed as a neutron flux monitor and for normalization. The present results are compared with previous measurements and evaluations.
(Gas-filled counters: ionization chambers, proportional, and avalanche counters)
引用本文:
ZHANG Guo-Hui**;LIU Xiang;LIU Jia-Ming;XUE Zhi-Hua;WU Hao;CHEN Jin-Xiang
. Measurement of Cross Sections for the 10B(n,α)7Li Reaction at 4.0 and 5.0MeV Using an Asymmetrical Twin Gridded Ionization Chamber[J]. 中国物理快报, 2011, 28(8): 82801-082801.
ZHANG Guo-Hui**, LIU Xiang, LIU Jia-Ming, XUE Zhi-Hua, WU Hao, CHEN Jin-Xiang
. Measurement of Cross Sections for the 10B(n,α)7Li Reaction at 4.0 and 5.0MeV Using an Asymmetrical Twin Gridded Ionization Chamber. Chin. Phys. Lett., 2011, 28(8): 82801-082801.
[1] Evaluated Nuclear Data File (ENDF) (Database Version of May 31 2010) http://www-nds.iaea.org/exfor/endf.htm
[2] Bichsel H and Bonner T W 1957 Phys. Rev. 108 1025
[3] Davis E A, Gabbard F, Bonner T W and Bass R 1961 Nucl. Phys. 27 448
[4] Giorginis G and Khryachkov V 2006 Nucl. Instrum. Methods A 562 737
[5] Zhang G, Guo L, Cao R, Zhang J and Chen J 2008 Appl. Radiat. Isoto. 66 1427
[6] Giorginis G and Khriatchkov V 2005 Nucl. Instrum. Methods A 538 550
[7] Zhang G, Chen J, Tang G, Gledenov Y M, Sedysheva M and Khuukhenkhuu G 2006 Nucl. Instrum. Methods A 566 615
[8] Ito N, Baba M, Matsuyama S, Matsuyama I and Hirakawa N 1994 Nucl. Instrum. Methods A 337 474
2011, Vol. 28 
